Is it possible?

I had unprotected sex on June 29th, going by the app, I was at a 33% chance of getting pregnant. He pulled out and I’m not on birth control (not trying, not preventing. We’ve decided whatever happens, happens since we’re both stable) today I started to have a metallic taste in my mouth and my gums are bleeding? Really random. And I’m having minor cramps but they come and go, it’s not consistent. I have pain in my back that comes and goes as well. Is it possible I’m pregnant? My period is suppose to start on 7/14. I’m okay with it either way ☺️